206443156 has 6 divisors (see below), whose sum is σ = 361275530. Its totient is φ = 103221576.

The previous prime is 206443073. The next prime is 206443187. The reversal of 206443156 is 651344602.

It can be written as a sum of positive squares in only one way, i.e., 164711556 + 41731600 = 12834^2 + 6460^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25805391 + ... + 25805398.

Almost surely, 2^206443156 is an apocalyptic number.

It is an amenable number.

206443156 is a deficient number, since it is larger than the sum of its proper divisors (154832374).

206443156 is a wasteful number, since it uses less digits than its factorization.

206443156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51610793 (or 51610791 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 206443156 is about 14368.1298713507. The cubic root of 206443156 is about 591.0172587610.

Adding to 206443156 its reverse (651344602), we get a palindrome (857787758).

The spelling of 206443156 in words is "two hundred six million, four hundred forty-three thousand, one hundred fifty-six".